连接ZK出现Error: A JNI error has occurred, please check your installation and try again

最新推荐文章于 2024-07-01 21:03:54 发布

原创最新推荐文章于 2024-07-01 21:03:54 发布 · 237 阅读

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文章标签：

#macos #spring boot #单元测试

本文介绍如何使用Curator框架连接ZooKeeper，并解决在Java环境中遇到的NoClassDefFoundError异常。通过修改代码结构，采用单元测试的方式成功实现了ZooKeeper客户端的初始化。

连接zk

public static void main(String[] args) {
        CuratorFramework curator = CuratorFrameworkFactory.builder().connectString("127.0.0.1")
                .retryPolicy(new RetryOneTime( 4))
                .connectionTimeoutMs(10000)
                .sessionTimeoutMs(6000)
                .build();
        curator.start();
    }

报错：

Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/curator/RetryPolicy
   at java.lang.Class.getDeclaredMethods0(Native Method)
   at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
   at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
   at java.lang.Class.getMethod0(Class.java:3018)
   at java.lang.Class.getMethod(Class.java:1784)
   at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
   at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
Caused by: java.lang.ClassNotFoundException: org.apache.curator.RetryPolicy
   at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
   at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349)
   at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
   ... 7 more

解决，不适应main方法执行，使用下面方式就可以

@Test
    public void testzk() {
        CuratorFramework curatorFramework = Demo.getCuratorFramework();
        System.out.println(curatorFramework);

    }




public static CuratorFramework getCuratorFramework() {

        CuratorFramework client = CuratorFrameworkFactory.builder().connectString("127.0.0.1:2181")
                .connectionTimeoutMs(60 * 1000)
                .sessionTimeoutMs(60 * 1000).retryPolicy(new RetryUntilElapsed(1000, 4)).build();

        client.start();

        return client;
    }